linux-kernel - Re: [PATCH v4 01/19] ARM: Make the argument to virt_to

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Date:	Tue, 25 Jan 2011 11:00:10 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 01/19] ARM: Make the argument to virt_to_phys() "const volatile"

On Monday 24 January 2011, Stephen Boyd wrote:
> On 01/24/2011 09:55 AM, Catalin Marinas wrote:
> > Changing the virt_to_phys() argument to "const volatile void *" avoids
> > compiler warnings in some situations where this function is used.
> >
> > Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> > Cc: Stephen Boyd <sboyd@...eaurora.org>
> > Cc: Arnd Bergmann <arnd@...db.de>

Acked-by: Arnd Bergmann <arnd@...db.de>

> Acked-by: Stephen Boyd <sboyd@...eaurora.org>
> 
> Any chance we can get this one patch into 2.6.38? It fixes a warning for
> MSM.

Stephen, you might want to have a look at why the warning even appears
on MSM. Most uses of 'volatile' are misguided, and there could be an
actual bug in there.

	Arnd
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